Revolving comb for combing machines



G. BETTON! REVOLVING COMB FOR COMBING Filed May 20, 195"! 2,941,260 MACHINES INVENTOR.

BY QM M0 United Sttes Guido Bettoni, Bergamo, Italy Ing. Giambrocono, Via Durini, 4, Milan, Italy) Filed May 20, 1957, Ser. No. 660,365

2 Claims. (Cl. 19-115) This invention refers to an improved revolving comb unit particularly for combing machines.

An object of this invention is that of providing an improved revolving comb unit of the kind including a semicylindrical frame mounted on a rotating member, allowing the immediate replacement of the comb carrying bars, obviating the use of screws, welding and the like, and reducing as much as possible the stopping of the combing machine for the replacement of said comb carrying bars. This object is obtained according to this invention by locking with the semi-cylindrical frame the comb carrying bars, by at least one locking ring, which can assume an assembly position, corresponding to the locking of all atent O said bars, and a disassembly position wherein all said bars are unlocked.

A further object of this invention is that of providing an embodiment of said semi-cylindrical frame in order to house a number of comb carrying bars much higher than according to known devices. This object is obtained according to this invention by forming a series of longitudinal cavities in said semi-cylindrical frame radially inclined according to a pre-established angle of incidence, said cavities having a peripheral distance from each other according to a constant pitch and each being able to house said comb-carrying bars.

Another object of this invention is that of providing a rapid and exact placing of said locking ring in connection with the head of said semi-cylindrical frame so as to control exactly said assembly and disassembly position. This object is reached according to this invention by providing a shift control of said locking ring, which can be checked by a stop so as to permit a relative shift of said locking ring with respect to said semi-cylindrical frame corresponding substantially to the thickness of said comb-carrying bars.

A further object of this invention is that of overcoming any possible construction imperfections both with regard to said semi-cylindrical frame and with regard to said comb-carrying bars, by providing at the same time a stable housing for said bars in said cavities. This object is reached according to this invention by providing an expansion notch in the ends of said comb-carrying bars.

The invention will be best understood from a consideration of the following detailed description, taken in connection with the accompanying drawings, forming a part of this specification with the understanding however, that the invention is not confined to any strict conformity with the showing of the drawings, but may be changed or modified, so long as such changes or modifications mark no material departure from the salient features of the invention as expressed in the appending claims.

Fig. 1 is a partial longitudinal sectional view of a revolving comb unit according to this invention;

Fig. 2 represents by one half an elevational view and by one half a sectional view of the semi-cylindrical frame housing the comb-carrying bars;

Fig. 3 represents a front view of the locking ring;

Fig. 4 is a side view of the locking ring of Fig. 3;

2 Fig. 5 is a side view of a stop ring; Fig. 6 is a perspective view of an end of a combcarrying bar;

Fig. 7 is a sectional view taken on the plane VH-VII of Fig. 1.

Referring to the drawings the revolving comb unit con:

sists essentially of a semi-cylindrical frame 10 better visible in Fig. 2 connected for instance by screws 11 to a rotating member indicated by 12, which is in turn driven by a combing machine of any known kind.

According to a feature of this invention, along the external surface of frame 10, longitudinal grooves 13 are formed for instance by milling having a constant pitch and being radially inclined according to a pre-established angle of incidence.

Said grooves 13 house the comb-carrying bars 14 and present substantially the same thickness as the latter.

The ends of bars 14 present projecting portions 15, 15a separated from the support of the comb-carrying bars by an expansion notch 16, thus providing a steady housing of bars 14in said grooves 13.

As results clearly from Figure 1 the heads 17 and 18 of the frame 10 are engaged respectively by a locking ring 19 and by a stop ring 20, whereby the contacting sections of said locking (19) and stop (20) rings and of said heads (17 and 18) present a grooved outline so as to allow a mutual rotatory displacement but not an axial displacement from each other.

The stop ring 20 is rigidly and permanently connected to the head 18 by at least a screw 21, while the locking ring 19 can be connected with the head 17 by at least a screw 22, which (Fig. 7) engages its end portion 23 in a ing ring 19 is provided with a set of teeth 27 distributed peripherally according to a pitch corresponding to that of the above mentioned grooves 13, the thickness of said teeth 27 being essentially the same as the thickness d of said comb-carrying bars 14, said teeth projecting over the head 17 so as to come into contact with the edges 28 of the projecting portions 15 of said comb-carrying bars 14, when the locking ring (19) is in the assembly position (Figures 1 and 7).

As results clearly from Figure 1 the stop ring 20 is formed with a projecting edge 29 which comes into contact with edges 28 of ends 15a of said comb-carrying bars.

The operation of the rotating comb unit according to this invention is as follows:

When screw 22 is in the position illustrated in Figures 1 and 7 and referred hereinafter as assembly-position, the teeth 27 of locking ring 19 are overlapping with the edges 28 of the comb-carrying bars 14, whereby the same are all locked. The other ends 15a of bars 14 are normally stopped by the projecting edge 29 of stop ring 20.

If a comb-carrying bar 14 has to be replaced, it is sufficient to partially unscrew the screw 22 so as to disengage the relative end portion 23 from the hole 24. Then a tool for example a pin shaped rod 30 is caused to engage with its end in one radial aperture 26 so as to rotate in anti-clockwise direction the locking ring, which will move with respect to the head 17 until the end portion 23 of the screw 22 will be stopped by an end wall of cavity 25.

In this mutual (hereinafter referred as disassembly Patented June 1960 '1 3 position) position of the locking ring 19 in respect of the head 17, the teeth 27 have been displaced peripheral! ly for a distance equivalent at least to the thickness d of the comb-carrying bar 14, whereby it is suflicient to use an extractor tool such as pliers to engage the needles 31 of bars 14 when extractionis required.

After the substitution of the comb-canying'bar it is sufficient to transmit. a clockwise movement by means of said pin shaped rod 30 to the locking ring 19 in re spect of the stationary head 17 until theend portion 23* of screw 22 stops against HIS/W211i opposite to the one mentioned above of cavity 25 and to turn screw 22 until its end portion 23 is engaged in hole, 24:.

As above specified during this assembly position all they teeth 27 lie immediately upon the edges28 of the bars 14 thus lockingthe, latter.

WhatI claim is:

1 An impro e r volvin comb suni 'nartic arly cr combing machines of the type including a semi-.cyl ndrh a pport ng frame ha ng a head. at each. nd c nected with a ro t ng member. nd wi h s rie ifo rry n bars having a pr jec ing por i at ch end, mprising-s n ecmb n tieu a frame. pr s ing a serie of longitudinal. s b antially ra ial cavities uniformly spaced from each other according to a constant pitch and housing said comb-carrying bars; at least one locking ring removably connected to at least one head of said frame; a series of locking; projecting teeth formed on said locking ring and distributed peripherally in relation assembly positionto lock the bars and in a disassembly position to unlock the bars; and one stop ring mounted ing a series of longitudinal substantially radial cavities uniformly spaced from each other according to a constant pitch and housing said comb-carrying bars; at least one locking ring removably connected to at least one head of said frame; a series of locking project- .ing teeth formed on said locking ring and distributed peripherally in relation with said constant pitch and able to lock, in an assembly position and to unlock in a disassembly position, only one end of said comb-carrying bars; connecting means to connect said locking ring with said head when in said, assembly position, said looking ring being capable of being rotated relative to the, head to place the teeth in an assembly position to lock the bars and in a disassembly position to unlock the bars; and one stop ring mounted on the other head of the frame for holding the other ends of the; bars; said connecting means comprising in combination a s rew engaging a threaded portion of said locking ring; said head having a radial hole and a peripheral cavity formed therein; said hole facing said threaded portion of the locking ring and adopted to receive the screw; the

peripheral length of said cavity being larger than the.

thickness of said comb-carrying bars; and said locking ring having a set of openings formed therein to facilitate assembly and disassembly of the comb-carrying bars.

References Cited in the file of this patent UNITED STATES PATENTS 1,610,407 Wood Dec. 14, 1926 

